Analysis of hydraulic fracturing of core of earth-rock dam |
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| Authors: | ZHU Jun-ga WENG Hou-yang WANG Jun-jie |
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| Institution: | 1. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 2. Chongqing Jiaotong University, Chongqing 400074, China |
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| Abstract: | The induced condition and mechanical mechanism of hydraulic fracturing is briefly analysed. Based on the triangle fracturing under water pressure and finite element method, an approach is suggested to judge the occurrence of hydraulic fracturing. In this approach it is assumed that there exist local permeable weak planes (cracks) in core; and the plane finite element method (FEM) for hydraulic fracturing analysis is established. The crack is taken as a soft material; and the effect of water pressure acting on both sides of the crack is modeled. By using FEM, the stress of element at the crack tip is obtained; and the possibility of hydraulic fracturing is judged. This approach can also simulate the development of hydraulic fracturing. |
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| Keywords: | earth-rock dam hydraulic fracturing water wedging finite elements |
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